Something happened to the blog yesterday and the e-mail subscriptions function stopped working. I fixed the problem, but unfortunately, if you had an e-mail subscription and prefer to continue to get updates by e-mail, you will need to subscribe again. Please do so by entering your e-mail address in the box on the right hand side panel. You will have to then follow the prompts to complete the process (typing some random letters and replying to a confirmation email). It is a three step process but should not take you more than a minute to complete. I just went through it myself.
I apologize for the inconvenience! If you have any questions or concerns please email me directly.